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【简答题】
假设矩阵 非奇异,则存在正交矩阵P,使得 =R,其中R是上三角矩阵。
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举一反三
【单选题】护士对患者进行健康教育,错误的是
A.
排便时自左向右环形按摩腹部
B.
尽量下床上厕所排便
C.
每天定时排便，以早餐后效果最好
D.
每日液体摄入量不少于2000ml
E.
多食用蔬菜、水果、粗粮等高纤维食物
【单选题】Which way does the following paragraph use to start a topic? Many people smoke. They smoke because they think it makes them cooler and it is a good way for them to show their manhood.
A.
Subject +what
B.
Subject + example
C.
Subject+ why
D.
Subject +how
【简答题】听下面一段材料，回答第1-2题。 1. Which way does the woman prefer to keep in touch with her family? A. By e-mail. B. By phone. C. By writing letters. 2. What does the man mostly use the Intemet to do? A. Chat with ...
【简答题】听下面一段材料，回答第1-4题。 1. In which way does the speaker check the movie information? A. By reading newspaper. B. By checking e-mails. C. By TV. 2. Why does the speaker like to arrive early at the theater? A...
【简答题】对于现在的全密封变压器,一般不再设储油柜,只是在油箱盖上装油位管,以监视油位。()
【单选题】Which way does the paying bank not be responsible for notifying the payee to withdraw money from the bank( )
A.
T/T
B.
M/T
C.
D/D
D.
The above options are
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